Mole Problems
Determine the number of moles of CO2 in 454 grams of CO2.
10.3 Mol
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
SO3
Styrene has the empirical formula CH, and there is 92.25% carbon and 7.75% hydrogen. If you have a molar mass of 104g/mol, what is the multiplier or factor to get the molecular formula?
C
What is the percentage of oxygen in carbon dioxide? (CO2)
72.7%
What is the molar mass of sucrose? (C12H22O11)
342g
Find the number of grams in 0.700 moles of hydrogen peroxide H2O2.
23.811 grams
What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?
C3H8
What is the molecular formula for styrene?
C8H8
What is the percentage of chlorine in sodium chloride? (NaCl)
60.7%
What is the molar mass of sulfuric acid? (H2SO4)
98g
Determine the mass in grams of 3.60 mol of H2SO4.
353 g H2SO4
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
Na3PO4
Analysis of ibuprofen yields a molar mass of 206g/mol, and the following composition: 75.7%C, 8.80%H, and 15.5% O. What is the molecular formula of ibuprofen?
C13H18O2
What is the percentage of carbon in sucrose?
42.1%
What is the molar mass of silver nitrate? (AgNO3)
170 g
How many moles are in 25.5g of silver?
0.24 Mol
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
N2O3
True or false? The molecular formula for ibuprofen is the same as the empirical formula.
What is the percentage of oxygen in sucrose?
51.5%
What is the molar mass of carbon dioxide? (CO2)
44g
Approximately how many moles are in 300g of sulfur?
10 Mol
What is the empirical formula if you have 35.98% aluminum and 64.02% sulfur?
Al2S3
Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?
C3H8O3
What is the percentage of iron in iron(III)oxide?
70%
What is the molar mass of hydrochloric acid? (HCl)
36g